/*
    * This file is part of ***  M y C o R e  ***
    * See http://www.mycore.de/ for details.
    *
    * MyCoRe is free software: you can redistribute it and/or modify
    * it under the terms of the GNU General Public License as published by
    * the Free Software Foundation, either version 3 of the License, or
    * (at your option) any later version.
    *
   * MyCoRe is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with MyCoRe.  If not, see <http://www.gnu.org/licenses/>.
   */
  
  package org.mycore.iiif.image.parser;
  
  import org.mycore.iiif.image.model.MCRIIIFImageTargetRotation;
  
  public class MCRIIIFRotationParser {
  
      private final String rotation;
  
      public MCRIIIFRotationParser(String rotation) {
          this.rotation = rotation;
      }
  
      public MCRIIIFImageTargetRotation parse() {
          boolean mirror = this.rotation.startsWith("!");
  
          String rotationNumberString = mirror ? this.rotation.substring(1) : this.rotation;
          Double rotationNumber;
          try {
              rotationNumber = Double.parseDouble(rotationNumberString);
          } catch (NumberFormatException e) {
              throw new IllegalArgumentException(rotationNumberString + " cannot parsed to a rotation value!");
          }
  
          if (rotationNumber < 0 || rotationNumber > 360) {
              throw new IllegalArgumentException(rotationNumber + " is not a valid rotation value!");
          }
  
          return new MCRIIIFImageTargetRotation(mirror, rotationNumber);
      }
  }